- Board resources: https://wiki.makerdiary.com/nrf52840-mdk-usb-dongle/resources/
- Board schematic: https://wiki.makerdiary.com/nrf52840-mdk-usb-dongle/assets/attachments/nrf52840-mdk-usb-dongle-schematic-v1.1.pdf
DRV2605L
- Amazon: https://a.co/d/79FvSRP
3.7V 140mAh Battery
- Amazon: https://a.co/d/eTpbtKU
TP4056 Charging Module
- Amazon: https://a.co/d/1lc5ZBI
Vibrating motor